[Marxism] Article in todays WSJ.com

[S. Artesian]

Today's  WSJ.com has an interesting article on Cisco's offering of $4 
billion in corporate bonds.  The article is about the "thawing" in the 
credit markets but it includes this interesting item:

"While Cisco has a cash hoard of $29.5 billion, the company can't readily 
tap those reserves to pay for outlays such as acquisitions. Only $3 billion 
to $4 billion of Cisco's cash is in the U.S. with the rest overseas, meaning 
the money would be subject to taxes if Cisco tries to bring it home."

Anybody have an idea of how to find some data as to amounts of corporate 
cash held overseas that make up a country's foreign reserve holdings?